“…Symptoms of hyperviscosity are rare unless the value is more than 5 centipoises (cp), but some patients with a value of 10 cp or more do not have symptoms [43]. The signs of the hyperviscosity syndrome include segmental dilation of retinal veins and flame-shaped hemorrhages, oronasal bleeding, blurring or loss of vision, headaches, vertigo, nystagmus, decreased hearing, ataxia, paresthesias, diplopia, somnolence, stupor, or coma [44].…”